Typewriter carriage return and platen spacer mechanism



2,084,215 NisM June 1'5, E. PEROZO TYREWRITER CARRIAGE. RETURN ANDPLATEN SPACER MECHA Filed sept. s, 19:55

2 Shee's-Sheet 2 ATTORNE-Y Patented June i5, w37 v I Unirse s'rarsscargar certes means 'ryrnwnrrlin cAnnraGE RETURN aan rLA'rEN SPACERmronsmsnr f Enrique'Perozc, Habana, Cuba Application September 3, i935,Serial No. 39,007

41l. claim. (ci. 19e- 65) The invention relates to a typewriter attachvand B the traveling carriage of said typewriter.

y f ment and more especially to a' combination type- This carriagesupports the roll platen C which `is writer carriage return and platenspacer. journaled in the usual manner and is hand turned The primaryobject of the invention is the for line spacing in the operation of thetypeprovision of an attachment of this character, writer. 'I'he platenis automatically rotated for 5 wherein through'the use thereof atypewriter carline spacing and the carriage returned to startriage willbe automaticallyreturned to starting ing position in the use of theattachment conposition and simultaneously therewith the platen stitutingthe present invention and hereinafter will be actuated for line spacingpurposes, there'- fully described.

i0 by eliminating these burdens upon the user of The carriage return ishad through the use of 10 the machine, the return of the carriage beinga key III having a stem II which is mounted effected by manipulation ofa key located outside transversely in the frame A for sliding movement0f the keyboard While rotation of the platen for and this key is locatedabove the keyboard of the line spacing is automatically had when thecartypewriter to protrude forwardly of the front of riage isshifted forthe return thereof to starting ,the frame A of the latter. At one sideof the 15 position. frame A, or in other words, secured to one endAnother object of the invention is thevproof the said frame A is abracket I2 having an vision of an attachment of this character,whereupstanding post I3 and a horizontal base I4,

' in the construction thereof is such as to permit respectively. Thepost I3 at its upper end prothe use in various makes of typewriters andthus vides a guide I5 fora toothed rack I6 detachably 20 avoiding handshifting in line spacing as is cusjoined with the stem II of the key I0so that the tomary ln the operation of the typewriter. rack will be heldin meshing engagement with a A further object of the invention is theprorack pinion Il fixed to a rotatable shaft I8. This vision of anattachment of this character, which shaft I8 is journaled in the post I3and a support is extremely simple in its construction, thorough- I9fixed to the base I4 of the bracket I2 to be 25 ly reliable andefficient in its operation, readily disposed at right angles to the stemII and crossand easily mounted upon a typewriter without rewise thereof.The shaft I8 carries a worm screw quiring any material valterations inthe construc- 20 meshing with a worm pinion 2l upon a hub 22 Ationthereof, strong, durable, and inexpensive to of a driving g'ear 23,it-being journaled upon a manufacture and install. stud axle 24 carriedby a support 25 joined vwith 30 With these and other objects in -view,the inthe base I4 of the bracket I2. The gear 23 is vention consists inthe features of construction, one of a train of meshing gears andpinions 28, combination and arrangement of parts as will these being.iournled 0n the SUDPOrt 25. The be hereinafter more fully described,illustrated outermost gear 26 of the train meshes with a rack in theaccompanying drawings, which disclose4 bar 21 iixed to the carriage B atthe rear thereof 35 the preferred embodiment of the invention and andlongitudinally disposed therein. Thus itfwill pointed out 1n the claimshereunto appended. be Seen that when the rack I6 is Operated on In theaccompanying drawings: pressing the key IIJ the train of gearing will beFigure 1 is 9, diagrammatic side elevation of a, Set 1n mOtlOn and thismOtOn Will be transmitted typewriter, it being represented by dottedlines to the rack bar 2'I so that the carriage B will be 40 and hav-lngthe attachment constructed in acdrivent0 return position 0rnitial'starting posicrdance with the invention applied thereto, thetion, the Carriage being advanced s usual under attachment, being in funlines, spring tensionand escapement control onoperat- Figure 2 is a,rear elevation 0f the rack and ing the keys of the keyboard (not shown)of the gearing adluncts of the attachmentt typewriter. 45

v 5o trigger.

Figure 3 is a vertical transverse sectional view Surrounding. the stemII of thekey III within through one of the gears of the train employedthe frame A pf the` typewriter iS a COilQd 00min the attachment.pression spring 28, it having connection with a c Figure 4 isa topplanview of the platen spacer collar 29 on the stem -I I, the? collar beingfixed thereto and with aoollar 30 made fast to the 50 Similar referencecharacters indicate correframe A andlooseiy surrounding the stem IIspending parts throughout. the several views in `of the key Iii. Thisspring 28 .is a compensator the drawings. for the rack it meshing withthe pinion I1 when Referring to the drawings in detail.- A desig thecarriage B is advanced as usual by operatnates generally the main frameof a typewriter, Aing the keys of the keyboard of the typewriter. 55

In other words, when it is desired to return the carriage to startingpoint or position after it has been advanced from right to left underthe operation of the keys of the keyboard of the typewriter, the key Iis depressed causing the rack I6 to operate the pinion 'l thus underfull movement of the rack the carriage is returned to starting position.The fulllrearward movement of the rack for the return of the carriagecompresses the spring 28 and as the typewriter is advanced in a letterspacing direction by manipulation of the keys of the keyboard of thetypewriter through the conventional escapement mechanism D the rack I 6will be moved forwardly in a stepby step action under the tension of thespring 28 so that the key l0 will be reset on completion oi' theadvancement of the carriage from right to left and thus by depressingthe key I0 the carriage can. be returned to normal starting positionfrom the right hand sideof the machine.

'Ihe platen C in the carriage B is rotated through ratchet mechanism(not shown), this usually being manually operated and included i Withthe attachment is an actuator trigger 3| for said ratchet mechanism andsuch trigger is extended forwardly of the carriage from the pivotalpoint 32 of the same therewith to protrude into the path of a trippingroller or abutment 33 upon the frame A at the left hand side thereof sothat when the carriage is returned to the right hand end of the framethe platen C will be automatically rotated for line spacing of the typedmatter in. the operation of the typewriter. The trigger 3| has pivotedthereto a one-Way'acting trip tip 34 which overrides the roller orabutment 33 when the carriage is moving from right to left so as not todisturb the trigger 3| under this movement yet when said carriage ismoved from left to right for the return thereof to starting position thetip 34 is latched so as to have the trigger 3| operated for line spacingof the platen under this return movement of the carriage. The trip tip34 is pivoted at 35 to the trigger 3| and a spring 36 connected with thesaid trigger and tip normally holds the tip in latching position withthe trigger.

The ratchet mechanism (not shown) for line spacing is manuallyset as iscustomary to regulate the extent of line spacing required of the platenand this trigger 3| automatically effects the turning of the platen forthe desired line spacing in'the writing when the typewriter is beingOperated while the carriage is returned to ilarting position onactuating the key l0 manuy. What is claimed is: An attachment for 'atypewriter having a movable carriage and an escapement mechanism forcontrolling the movement of the carriage in letter spacing direction,comprising a. substantially' Y-shaped bracket for mounting on atypewriter frame for vertical disposition thereof, a key stem slidablytted in the frame of said typewriter, a bearing on the bracket for thesaid key stem, said key stem having a reduced inner end slidably fittingsaid bearing, a rack on said stem next to the reduced end, a train ofgearing supported from said bracket, a worm gear fitting one of thegears of the train, a worm shaft bridging the worm gear and meshingtherewith, a rack pinion on said worm shaft and meshing with the rack onsaid stem, a rack on the movable carriage of the typewriter and engagedby another gear of said train, a key head on said stem and locatedspaced from the front of the said typewriter frame and a spring iittingthe frame and the said stem for tensioning the latter.

ENRIQUE PEROZO.

